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Population structure and habitat use by the spider Latrodectus katipo along the Manawatu–Wanganui coastline
It is concluded that katipo populations along the Manawatu–Wanganui coastline are threatened by a range of human activities, and that management action may be required to prevent local extinctions of this charismatic invertebrate.
Population monitoring of Latrodectus katipo Population monitoring of the endangered New Zealand spider , Latrodectus katipo , with artificial cover objects
The endangered New Zealand widow spider, Latrodectus katipo, is believed to have undergone marked population decline over the last 30 years, but as monitoring methods are timeand labour-intensive,…
Population monitoring of the endangered New Zealand spider, Latrodectus katipo, by artificial cover object.
Latrodectus katipo populations were found to have highly female biased sex-ratios, with a longer breeding season at Himatangi than reported previously at other sites, and ACOs could be used as a non-destructive monitoring tool for many other invertebrate species.
The interactive effects of livestock exclusion and mammalian pest control on the restoration of invertebrate communities in small forest remnants
- R. Didham, G. Barker, J. A. Costall, Lisa H. Denmead, C. Floyd, C. Watts
- Environmental Science, Biology
- 1 January 2009
Using structural equation modelling, it is found that treatment effects were largely mediated by a cascading series of indirect causal paths involving altered soil chemistry, vegetation composition, and litter mass relative to large forest reserves, although the livestock exclusion × pest control interaction was inadvertently confounded with differing slopes and areas of remnants in different treatments.
The endemic tree Corynocarpus laevigatus (karaka) as a weedy invader in forest remnants of southern North Island, New Zealand
With its range anthropically extended, management of karaka's invasiveness appears necessary in lower North Island, South Island, and the Kermadec and Chatham Islands, involving elimination or control, depending on local cultural values.
The ecology and conservation of Latrodectus katipo, New Zealand's endangered widow spider : a thesis presented in partial fulfillment of the requirements for the degree of Masters of Science in…
- J. A. Costall
The ecology and conservation of Latrodectus katipo, New Zealand's endangered widow spider
- J. A. Costall
- Environmental Science
New Zealand has two endemic widow spider species; Latrodectus katipo Powell , 1871 and L. atritus Urquhart 1890. This study focused on the population dynamics and habitat usage of L. katipo , which…